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A110025 Smallest primes starting a complete three iterations Cunningham chain of the first or second kind. 3
509, 1229, 1409, 2131, 2311, 2699, 3539, 6211, 6449, 7411, 10321, 10589, 11549, 11909, 12119, 17159, 18121, 19709, 19889, 22349, 22531, 23011, 24391, 26189, 27479, 29671, 30389, 31771, 35311, 41491, 43649, 46411, 54601, 55229, 56311 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Terms computed by Gilles Sadowski.
LINKS
Chris Caldwell's Prime Glossary, Cunningham chains.
FORMULA
Union of A059763 and A110024. [R. J. Mathar, May 08 2009]
EXAMPLE
1409 is here because, through the operator <2p+1> for chains of the first kind, 1409 -> 2819 -> 5639 -> 11279 and the chain ends here.
2131 is here because, through the operator <2p-1> for chains of the second kind, 2131 -> 4261 -> 8521 -> 17041 and the chain ends here.
CROSSREFS
Sequence in context: A142819 A183058 A256709 * A059763 A031421 A255183
KEYWORD
easy,nonn
AUTHOR
Alexandre Wajnberg, Sep 03 2005
EXTENSIONS
Edited by R. J. Mathar, May 08 2009
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)